What it is?
It's additional server between you and physical machine where server is running. Server proxy is in USA and our server in Europe. When you will connect using proxy server then you can have lower ping than connect directly to our server. This is directed to people from outside of Europe.

How to enable/disable?
When playing with proxy server didn't decrease ping then we recommend you to disable this option in account panel on website, but this option is enable by default for all accounts.